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jQuery example: How to delete the last child element using jQuery?

PHPzOriginal: 2024-02-20 19:45:041043browse

Title: jQuery Example: How to use jQuery to delete the last child element?

In web development, we often encounter situations where we need to operate DOM elements through JavaScript. As a widely used JavaScript library, jQuery provides many convenient methods to manipulate DOM elements. This article will use an example to introduce how to use jQuery to delete the last child element, and provide detailed code examples.

First, we need to introduce the jQuery library into the HTML file. It can be introduced through a CDN link, or you can download the jQuery library file and introduce it into the project. Next, create a parent element with child elements in HTML so that we can demonstrate how to remove the last child element.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>jQuery删除最后一个子元素</title>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
</head>
<body>
    <div id="parentElement">
        <div>子元素1</div>
        <div>子元素2</div>
        <div>子元素3</div>
        <div>子元素4</div>
    </div>

    <button id="deleteButton">删除最后一个子元素</button>

    <script>
        $(document).ready(function(){
            $("#deleteButton").click(function(){
                $("#parentElement").children().last().remove();
            });
        });
    </script>
</body>
</html>

In the above code, we first create a parent element div containing multiple child elements and add a button behind it. When the user clicks the button, the last child element is deleted through jQuery's click event listening function.

In the handler function of the click event, find the parent element div through the selector $("#parentElement"), and use children(). last().remove() to delete the last child element of this div.

Through this code example, we have implemented the function of using jQuery to delete the last child element. In actual development, you can modify and extend this code according to specific needs and situations to achieve more complex DOM operations.

Summary: This article introduces how to use jQuery to delete the last child element through a simple example, and demonstrates the implementation process in detail through code examples. I hope this article can help readers better understand and use the methods in the jQuery library and improve front-end development efficiency.

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